Siemens TV Converter Box 611 Manual De Usuario

Motor components of the built-in motor and options 

 

3.2 Thermal motor protection 

Table 3- 1 

Cooling method 

Size 

Cooling jacket 

Integrated cooling 

1FW609 

X 

 

1FW613 

X 

 

1FW615 

X 

 

1FW616 

 

X 

1FW619 

 

X 

1FW623 

 

X 

1FW629 

 

X 

3.2 

Thermal motor protection 

3.2.1 

Description of the temperature sensors 

Temperature sensor 

1FW6 stators are equipped with the two temperature monitoring circuits described below 

(Temp-S and Temp-F) to protect the stator against excessive thermal stressing and to 

monitor the temperature during commissioning and operation: 

Temp–S 

Two temperature shutdown circuits consisting of PTC thermistor detectors (PTC elements) 

are provided for monitoring the motor winding: 
●  1 x PTC 130 °C element per phase winding (U, V, and W), i.e. switching threshold at  

130 °C and 

●  1 x PTC 150 °C element per phase winding (U, V, and W), i.e. switching threshold at  

150 °C. 

The PTC elements of the two temperature shutdown circuits are each connected in series 

with a triplet. 
The characteristics of the PTC elements comply with DIN VDE 0660 Part 303, DIN 44081, 

and DIN 44082 (also refer to the subsequent table). 
The cable connection is also monitored with PTCs 80 °C on the housing. A PTC 80 °C is 

connected to the PTC 130 °C triplet and a PTC 80 °C is connected to the PTC 150 °C triplet 

in series. 
 
Function: 
Each PTC element has a "quasi-switching" characteristic; i.e. in the vicinity of the rated 

response temperature ϑ

NAT

 (switching threshold) the resistance changes suddenly (step 

function). As a result of the low thermal capacity and the good thermal contact between the 

PTC element and the motor winding, the sensors - and therefore also the system - quickly 

respond to inadmissibly high stator temperatures.  

 

1FW6 Built-in torque motors 

44

 

Configuration Manual, 05/2009, 6SN1197-0AD00-0BP7